pushimage: allow for multiple keysets/image inputs
If we want to sign multiple images with multiple keysets, but the same
artifact type, today we can't because we assume a branch produces just
one of each (a single recovery or factory image, but multiple keysets).
With some firmware branches (like samus) though, we include multiple
firmware images that are the same type, but for different pieces of
hardware, which means different keysets. This is a bit outside of the
original design/assumption of pushimage/branches, but we can do it!
Now the input insns format will check & merge overlays. So a file that
looks something like:
[insns]
channel = dev
[insns.one]
keyset = Zinger
input_files = zinger/ec.bin
[insns.two]
keyset = Hoho
input_files = hoho/ec.bin
Will post two insn files:
[insns]
channel = dev
keyset = Zinger
input_files = zinger/ec.bin
And:
[insns]
channel = dev
keyset = Hoho
input_files = hoho/ec.bin
The keyset part doesn't seem terribly interesting (since we already allow
people to specify multiple keysets in [insns]), but makes more sense when
you tweak the other fields like channel, input_files, and output_names.
BUG=chrome-os-partner:47557
TEST=unittests pass
Change-Id: I4e8f6a88422c73e2b5b3c1042bf240afc3b80d83
Reviewed-on: https://chromium-review.googlesource.com/312300
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>